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W, WAILEY, OF NEW ORLEANS, LOU ISLANJLI ASSIGNOR T0 NEW'ORLEANS PNEUMATIGQPROPELLING COMPANY" Letters Patent No. 81,713, dated September 1, 1868.

" IMPROVEMENT IN PAPER RESERVOIRS FOR OlliPlEtESSED"AIEY TO ALL WHOMIT MAYQONCERN:

Be it kuownthetl, C. W, WAILEY, ofthe city of New Orleans, parish of Orleans, and State of Louisiana, have invented a certain new, useful, and improved Paper Air-Tank for Holding Compressed AtmosphericAir; and I do hereby 'dclare the following to be a full, clear, and exact description of the same, referencebeing had to the annexed drawing,in which- Figure l is a perspective view of my said paper tank, as it appears in a completed or finished state.

Figure 2 a longitudinal sectional view of the saine.' y i Figure 3 an inside view of. one kind of metallic hea-d'that is used by me; and

Figure 4, sectional views that show another or alternate form of vhead forV closing the ends of'my tanks.

The object of my invention is to provide a cheap and easily-manufactured tank, that-shall be at the same time very light and portable, and sufticiently strong to withstand a pressure .of at least three hundredpounds to the square inch, my designbeing to carry in them, on street-railroad cars, a suioientquantity of compressed atmospheric air to work a pneumatic engine, of which also I am the inventor, on the car, for the propulsion of the same from one terminus of a cityrailroadvto the other, or, if necessary, from one terminus to the other, and then back again to the starting-point, without renewing the supply, so that only one, or, at most, two sta- .tionary steam-engines need to be provided for filling them, by means of suitable air-pumps, either in a direct manner, or through the agency of stationary reservoirs, which the said engines shall keep always lled',at or a little above the pressure required in the tanks on the car, at the starting of the latter, to propel the same the prescribed distance, whether that be to the end of the road, ior tothe end and back again.

.But my invention will' be more quickly and clearly understood by reference to the annexed drawing.

A, g. 1, is my tank as it appears when completed and ready to be put on a car. The most convenient place on a car to put the tank is on the top or e'ove'r of the same, and in order to provide for au abundant supply of compressed' air, without having` too large a tank, I use two, one on each side ofI the top of the car,'and placed longitudinally thereupon. Apex-turcs through the heads of the tanks afford a means of establishing a i connection with the stationary steam-engincsnor the reservoirs connected therewith, as'the case may be, in order to ll the tanks with compressed air, .and alsofort-he eduetion of the said air fromthe tanks into the cylinder 'of the pneumatic engine, through proper pipes thatienter the said apertures.. The drawings show but one of these openings, wbut anyfmechanic of ordinary skill will know where to make them u In constructing my tanks, I use :i cylindrical former ot' suitable diameter,'=ar.ouud' which I wrap any description of strong paper that possesses uniformity and closenessof texture,`untilithe desired thickness of the shell of the samephas been attained by a multiplication of folds or wrappings, ord`e'1 prevent wrinkling as the successive wrappings are put around the formen and to secure an equa{1 thick`n erywhere in `the shell ot' the tank, and, by the close cohesion of 'each of these successive w1'apping's`5fthepne"to another, a uniformity of resisting power or strength throughout all portions of the-said shell, the paperiiuSt be wetted before it is used, and great care, taken, as each new 'or additional thickness or sheet is put ou, that'evcryvjoint is broken er overlapped, whilst, at the same'tizne, a thin coatingof glue or varnish, or other equivalent substance,'is' spread upon or applied to the same; This-coating may be applied by means of a soft parallel roller that impinges against-theformen and operates after'the manner of an vin-king-roller 'in aA printing-press. This rollerfsubserves'thc additional function of pressing down the paper closely, and in an equal manner, at all points upon the surface ofthe circumference ofthe formel-,1 and thusaids in establishing uniformity throughout all parte of the shell, in thetpartieulars of thickness and composition or structure.,

Therequired thickness ofLfsl'i-.ell being attained, the tank' is withdrawn from the former assoon as the, paper is dry enough to allow it to be done with safety. Being withdrawn, the tank representsa hollow paper cylinder, with open ends, which I close .with metallic helads,`B`, either as formed' at figs. l, 2, and 3, or as atflg.

4. The heads B, when constructed as shown at Egs. 1, 2, and 3, are providedwith an' annular Vgroove near amie '2 their perimeters, in which the ends ofthe paper shell enter, as shown at a, iig. 2, the said ends having been first cut oli` smoothly, and then sloped or chamfered, in order to secure a tight joint. This form of head is held in place by means of longitudinal rods, b, on which the nuts c are fitted by proper screw-threads. The alternate form of head that is delineated at fig. 4 is provided with a screw-thread around its perimeter, and thus is screwed directly into the ends of the shell or cylinder, and is then secured in place by external bands, d, as shown. To

strengthen the heads B, ribs, e, may be cast upon them, either yon their inner or outer faces, .as may be deemed i most advisable.

When constructed as ab'ove described, I haveifound that a tank eighteen inches in diameter, and having a shell-thickness of only half an inch, will safely'bear a pressure of from twenty to twentyfive atmospheres from within the same; and I have thus demonstrated that all the conditions I have aimed to accomplish in its creation are completely fulfilled.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

The paper air-tank A, when closed at its extremities with metallic heads, B, and otherwise constructed in the manner and by the use of the means herein described for the purpose set forth.

C. W. WAILEY.

Witnesses RUFUS R. RHODES, H. N. JENKINS. 

